The scores on a mathematics exam have a mean of 70 and a standard deviation of 5. Find the x-value that corresponds to the z-score 2.33. Give the exact answer.

Given:

Mean (μ) = 70

Standard deviation (σ) = 5

z-score = 2.33

To find:

The X-value.

Solution:

We know that,

On substituting the values, we get

Multiply both sides by 5.

Add 70 on both sides.

Therefore, the required X-value is 81.65.

15

step-by-step explanation:

14

step-by-step explanation:

14 x 3 = 42